Highlight all trajectory segments with a specific tag assigned
On both the assay and individual larva views, it would be great to visualize all trajectory segments with a specific tag assigned (or no tags assigned). Trajectory segments could be highlighted on pressing and holding the key bound to the desired tag.
Proposals:
- In addition to keybindings proposed in #44, a key should be associated with the unlabelled timesteps.
- On holding a tag-related key, after 250ms, show the corresponding highlighted trajectory segments. On releasing the key, hide/unshow the highlighted segments.
Note that assigning a tag with the same keys as proposed in #44 requires the key to be pressed during less than 250ms, and proceeding with tag assignement on releasing the key.